International Maths Olympiad Forum By SOF Olympiad Trainer

Abinav A from KV, Bengaluru

Subject :IMO Class : Class 6

Match the following.

A(i) → (r), (ii) → (s), (iii) → (p), (iv) → (q)
B(i) → (p), (ii) → (r), (iii) → (q), (iv) → (s)
C(i) → (s), (ii) → (p), (iii) → (r), (iv) → (q)
D(i) → (s), (ii) → (r), (iii) → (p), (iv) → (q)

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Darshika Sundar Sahu from Billabong High International, Vadodara

Subject :IMO Class : Class 5

If you add 1 to a number and round it off to the nearest ten, the answer is 1870. If you add 2 to the number and round it off to the nearest ten, the answer is 1880. What is the number?

A1873
B1863
C1874
D1864

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Meghna from head start, Bangalore

Subject :IMO Class : Class 6

The given figure is made up of six identical squares. Find the perimeter of the given figure.

A296 cm
B398 cm
C378 cm
D108 cm

in the solution it should be 14 x 27, not 12 x 27.

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Shreyan from Delhi Public School Bangalore East, Bangalore

Subject :IMO Class : Class 5

Ruchi baked a cake and gave 2/3 of it to Priyanka and 1/8 of it to her children. What fraction of cake was left with her ?

A5/24
B5/19
C3/24
D1/24

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Shreyan from Delhi Public School Bangalore East, Bangalore

Subject :IMO Class : Class 5

2 oranges cost ₹ 15 and 4 bananas cost ₹ 12. Samaksh bought 12 dozen of oranges and 15 dozen of bananas. If he gave ₹ 2000 to shopkeeper, then how much change did he get back?

A₹ 240
B₹ 150
C₹ 380
D₹ 442

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Arav Goswami from DPS Bengaluru East , Bengaluru

Class : Class 5

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Shreyan from Delhi Public School Bangalore East, Bangalore

Subject :IMO Class : Class 5

Find the value of x.
99 × 96 = (99 × 100) - (x × 33)

A13
B12
C63
D15

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savyasachi from montfort , roorkee

Subject :IMO Class : Class 8

Which greatest number will divide 3026 and 5053 leaving remainders 11 and 13 respectively?

A15
B30
C45
D60

A)The solution shows 15 as answer but ,marks option a) incorrect

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Angshu from Dehli Public School Bangalore East, Bangalore

Class : Class 8

The solution for this question clearly says that option A) is correct, but the correct answer is registered as option C). Please fix this.

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Romit Gupta from MVN senior secondary school sector 17 Faridabad , Faridabad

Subject :IMO Class : Class 10

Which of the following statements is incorrect?

A For natural numbers a and b, if a divides b² then a divides b.
B For any natural number is irrational.
C Product of distinct prime numbers is always equal to their L.C.M.
D For any natural number n, 6ⁿ never ends with digit zero.

the answer is given wrong . The correct answer should be B

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Vinay HD from vvssphs, bangalore

Subject :IMO Class : Class 8

If 4 of the interior angles of a regular decagon are x° each and the sum of the remaining angles is 864° , then find the value of x.

A260°
B180°
C144°
D124°

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shaurya aggarwal from scholars rosary senior secondary school, rohtak

Subject :IMO Class : Class 9

In the given figure (not drawn to scale), O is the centre of the circle. Find the value of x.

A30°
B44°
C42°
D50°

please specify whether CD is a straight or not. if it is a straight line then the figure is not correct. the being that triangle BOD is congruent to triangle BOC by SSS congruency. so by CPCT angle BOD and angle BOC is of 72 degrees. which doesn't satisfy that CD is straight line. as the sum of angles is 144 degrees not 180 degrees

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